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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 4, 2013
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for All Makes and Models
Help Request Answers
1994 Acura Legend GS 3.2L Transmission VIN: JH4KA8265R
This vehicle came in because the D4 light flashes after about a quarter mile of driving. The speedometer also intermittently jumps. The module comes up with a code 4 when commanded to display codes. The diagnostic flow chart says the possible cause are disconn...
2002 Audi A4 Quattro 3.0L wheel speed sensor VIN: WAULT68E62
car came in with abs light on, has code 00283 lf wheel speed sensor fault. replaced lf wheel speed sensor, drove car and light came back. heard axle could possible cause this code also ,so i replaced the axle ,code comes back.watching the wheel speed sensors w...
2002 BMW 530i 3.0L Poor Idle Quality, MIL Lamp on VIN: WBADT63432
Hello fellow iatn members, i am at a dead end and need some help. This vehicle idles at about 950-1000 rpm at idle whether in [...] or drive. I know there is no vacuum leaks for i have checked with my smoke tester. I even had a guy come out and do a reflash to ... Trouble codes: P0505 (Idle rpm plausibility leakage)
2008 BMW X5 3.0si 3.0L AUX input VIN: 5UXFE435X8
This car came in the with customer giving us a pile of parts wanting to be installed. (car was diagnosed at the dealer) Parts list: 2 tail lights, 1 rear speaker, 1 amp (AMPH/AMPT), 1 tele (TCU/ULF), 1 wireless box (ULF/SBX-H) and 1 Aux input jack. Symptoms...
1968 Chevrolet C10 Pickup 5.3L Engine VIN: CE248Z1721
Hello, We have a rebuilt 5.7L Chevrolet engine that was running in a later model Blazer. This engine was transplanted into a 1968 Chevrolet C10 pickup. The only thing that was changed was the camshaft and bearings. The engine had less than 1000 miles on it bef...
1996 Chevrolet K1500 Cheyenne 5.7L under accleration VIN: 2GCEK19R9T
Vehicle has a noise under acceleration. It shows up in every gear but more so in the 1st and 2nd. When you accelerate very gently it doesn't "grind" however when you accelerate with any vigor it really grinds at about 2000rpm on up. It stops immediately upon l...
2002 Chevrolet Impala 3.4L Starting VIN: 2G1WF52E42
Hey guys im working on this 2002 impala, this car was brought to me with a no crank and headlight intermidiate problem i end replacing bcm for headlight problem and got fix but the car still no crank,i check all the starting circuit form pcm to starter ok if g...
2008 Chevrolet Express 1500 4.3L No Start VIN: 1GCFG15X18
This van has been repaired by the dealer.I am just looking for confirmation from some gm techs.Van had a problem where the temp gauge on the dash would drop to 0 even though with scanner hooked up engine temp would read normal.When van was shut off an try to r...
1993 Dodge W250 5.9L Speedometer VIN: 1B7KM26C4P
Hi fellas, I need a senior techs. opinion on this old truck. This thing is about to leave me bald from scratching my head. The complaint is speedo inop so I start with the basics and do a visual inspection of all parts and wires. I found no obvious problems ev...
2000 Dodge Ram 1500 Van 5.9L output speed sensor VIN: 3B7HF13Z9Y
need help on this truck. will set code po720 if driven far enough and then starts shifting weird. we can see data from output speed sensor int. going crazy. will jump to 5000 rpm and will jump to 0 rpm int. or anywhere in between. it will not act up when runni...
2007 Dodge Ram 3500 ST 6.7L Hesitation, Cuts out, MIL Lamp on VIN: 3D3MX48A57
customer has complaint that this truck has a stumble on accel. it had p1011 and p000f in to begin with and later on set code p0087 during my road test. when under hard accel the fuel pressure falls from set point pressure by about 8000 psi. it will get to 2500... Trouble codes: P1011, P000F, P0087
2009 Dodge Grand Caravan SE 3.3L Starting VIN: 1D8HN44EX9
Van towed in for no crank no start.tested batt weak and cable end broken,repaired and still nos start.perform batt reset,still no start.this van has a fobic and a wireless ignition node (win)only have one fobic to work with at this point.notice when insert key...
1998 Ford Windstar GL 3.8L no shifts VIN: 2FMZA5144W
I just bought this van and a week after i bought it the speedometer stopped working and the shifts were erratic so followed all the steps in alldata and confirmed a bad vss now the transmission will not shift after it has been sitting at idle in park for 10-15...
1998 Ford Windstar GL 3.8L no crank inermittent VIN: 2FMZA5149W
so here is one for ya this van runs fine but customer complains that it has a intermittent no crank/start and had towed into shop sure enough fires right up for me so i pulled in and scanned with modis and found the only thing i can comm with is the pcm all ot...
2000 Ford Excursion XLT 7.3L MIL Lamp on VIN: 1FMSU41F7Y
This vehicle came from a transmission shop. They had repaired the transmission and on their test drive, it began to run poorly after a few miles and started stalling. They replaced the UVC harness on the right side with a dorman unit but still wouldnt run righ... Trouble codes: P1271, P1272, P1274, P1276
2001 Ford Focus LX 2.0L Poor Idle Quality, Misfire VIN: 1FAFP33P81
The most intermittant misfire you've ever seen. We did a tune-up as a precaution because it wouldn't act up for us a month ago, just came back today, missing. No codes, but could see only #2,#3 missed in Mode 6 data. There seems to be no way we can duplicate i...
2005 Honda Civic EX 1.7L Cooling System VIN: 1HGEM22955
The vehicle keeps overheating at low speed after driven on the freeway at regular speed. Customer states when get off the freeway the vehicle starts to overheat at about 40 MPH. We have already replaced the thermostat and the radiator. Have checked the fans an...
2005 Hyundai Accent GLS 1.6L Starter Dragging VIN: KMHCG45C25
Hyundai Techs! Car Came in Hard to Start Hot, Draging like Starter binding! Changed Starter, Ran Vehicle, GREAT! until Customer came to start. Starter Drug once and then wouldnt do again, lol. With Egg on my face, told customer I would put another starter in a...
1999 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J4GW68N9X
Vehicle hard to start, sometimes w/half way acc. Pedal start fine, if let go the acc. Pedal start missing, making noise by timig chain and dies. Codes start appearing, not sure if the ecm is causing this. There are power and ground. Please help. Trouble codes: P0351, P0352
1979 Lancia Zagato 2.0L Thermostat VIN: 828BS12001
Just replaced the timing belt on this little gem out of long time storage. Cleaned out fuel system and it runs well. Problem is that the thermostat does not open. This is an externat stat built into an aluminum housing with 3 large hoses going to it. I cannot ...
2003 Land Rover Discovery S 4.6L Misfire VIN: SALTL16423
This vehicle was in the shop for originally oil leaks out of the oil pan, head gasket, and timing cove gasket. Cylinder heads were removed and the were faced at machine shop, valves were tested for leakage but were not leaking. (service writer decided not to h... Trouble codes: P0304 (Cylinder 4 miss fire detected)
2005 Land Rover Range Rover HSE 4.4L air suspension VIN: SALMF11435
Hey i have a range rover here that the air suspension stops working intermittently. It has a code 116 static pressure in reservoir. I checked the reservoir pressure and its ok when its sitting but when you lift the suspension it drops from 11.9 bar to 9 bar an...
2004 Mazda 6 S 3.0L Hesitation, Surge, Stall
Hi guys i need some new ideas. This Mazda 6 has me stumped. When driven for half hour or so it will fall on its face when kicked down to passing gear around 4000 rpm until it shifts. It would also backfire (lean farts). I installed a fuel pressure gauge inline... Trouble codes: P0171
2003 Mercedes-Benz C230 Kompressor 1.8L Starting VIN: WDBRF40JX3
Car came in with a no start. Autologic shows DAS start not authorized. The strange thing is that if you honk the horn then the car will start. Has anybody run into anything like this?
2006 Mercedes-Benz C230 Sport 2.5L MIL Lamp on VIN: WDBRF52J06
This vehicle came to us with a P0411 code and an inoperative secondary air pump. We replaced the air pump, with one which does work when powered up. There is power to the relay. The problem is there is no power to the air pump when the relay is bypassed. We tr... Trouble codes: P0411 (Secondary air System)
2000 Mercury Grand Marquis LS 4.6L fuel pump VIN: 2MEFM75W1Y
Hi all, I put the fuel pump pressure tester in the fuel rail and found the pressure to be 20psi and its suppose to be 30 to 35psi. when you turn on the head lights the pressure goes from 20psi right on down to nothing and stalls. Got two codes one was a Po232 ...
2009 Nissan Altima S 2.5L air mix door VIN: 1N4AL21E79
the problem is it goes to hot and gets hot, put it on cold and it gets cooler a couple of degrees and thats all, don't completely understandthe system but seemslike it is not closing off heat all the way. Is there any way for sure to see if the door is stickin...
1996 Pontiac Grand Am SE 2.4L Running. VIN: 1G2NE52TXT
Well this one is weird. Im mainly writing to see if any has experienced this specific issue. Car will start up fine and run good. Alternator is in spec of amps and volts. All interior functions properly operate. The exterior is were things get weird. Headlight...
2002 Pontiac Sunfire SE 2.2L power steering pump
This car was leaking power steering fluid from the pump shaft seal. I replaced the pump with a unit from a auto wrecker. The problem is it is still leaking, but here is what I am not sure of. When I take the cap off of the pump reservoir it "pops" from the pre...
2009 Pontiac G8 GT 6.0L Airbag VIN: 6G2EC57Y49
Hi. This car came in with an airbag light on. Scanned for codes - no codes. Read data. Found passenger seat position sensor not present. Checked wiring for opens or shorts - found none. All readings are at 0.0001 ohms. Checked and replaced sensor. Still no cha...
2005 Saab 9-3 Linear 2.0L oil level sensor VIN: YS3FB79N15
oil leaks at oil level sensor connector in pan-is there any fix for this or do I have to replace the sensor? anyone had this problem? thanks
2006 Saturn Ion-3 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8AL55F96
I inherited this from another tech here iin the shop. Twice(!!!) it has misfired on cylinder 2 & 3. No rhyme or reason. Shut the car off, count to 12, and it runs fine. Now I have it. The only odd thing I have seen is the cooling fan. All if fine up to abou...
2002 Subaru Forester 2.5L oil VIN: JF1SF65592
Did head gaskets to fix external head gasket leak at 82,000 miles. Car runs and drives nice. It now consumes 2 quarts of oil per 500 miles. No visable leaks; Does not smoke; Runs fantastic! We are baffled on this one! Plugs are fine; Cylinder leakdown test no ...
1997 Toyota Avalon XL 3.0L aligment VIN: 4T1BF12B7V
Hey guys I got this car up in the lift off the ground the tires are not touching anything but when you turn the steering wheel fron the center all the way to the left, the steering wheel and the tires go back to the center on its own, know if you turn the stee...
2007 Toyota Avalon XLS 3.5L Air Bag VIN: 4T1BK36B17
Thanks for any help you can give me, I just put in an evaporator core in this vehicle. (no small task!) Everything went okay except when I removed the electrical connector for the air bag by the knee, the center yellow connector retainer broke apart. After put...
1998 Volkswagen Beetle TDI 1.9L No Start, Hesitation, Cuts out VIN: 3VWBF61C4W
Car had an engine swap at another shop, client brought car to us to check injection pump with VAG. Car would not start, had codes for glow plug control. We started it with ether. While using VAG, we could not see the pump timing on the graph at all. We did hav...
2002 Volkswagen Jetta TDI 1.9L Braking VIN: 3VWSP69M72
This VW came in with a request to inspect and replace rear brakes. Rear brake pads were worn to 2 mm lining remaining. Left front (sensor) brake pad was worn excessively so pads were replaced and rotors machined. During the road test the brake pedal is extreme...
2004 Volkswagen Jetta TDI 1.9L MIL Lamp on, No Power VIN: 3VWSR69M14
I have a wonderful 2004 VW Jetta 1.9L TDI that is having some running problems. Very intermittently will act up when driving. When is does act up it will set a P0226/16610 Throttle/Pedal Position Sensor/Switch "C" Circuit Range/Performance code and go into a r... Trouble codes: P0226 (16610 Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance)
1997 Volvo V90 2.9L Engine VIN: YV1965966V
Hi Volvo Techs This Volvo v90 was brought to us having spent 6 weeks at a repair shop before it was fixed for non-running. The owner had it for a week before it failed to start. We find Volvo VST failed to communicate with ECM [PCM} or Immoilizer but can com...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2005 BMW Z4 2.5i 2.5L Airbag light VIN: WBABT32050
Gentlemen, thank you all for your advice and input. Having never come across this model before, you made both finding the components and checking them much easier. All modules and wiring were dry and in good condition, the only thing I could find was slight co...
2008 Cadillac Escalade 6.2L Lift gate VIN: 1GYEC63878
I thought i closed this, sorry. It was the micro switch in the motor. only comes as a whole module. $450 from dealer. Thanks for all your help.
1981 Chevrolet G30 Hi-Cube 5.7L Unknown VIN: 2GBJG31M8B
Thanks to all for your help. All the wiring under the hood was untampered. The customer chose to run a new wire from the low pressure switch to the compressor and it works perfectly. 42 degrees and no freeze up. These older systems can be converted and work we...
1997 Chevrolet Astro 4.3L No Start, Cuts out, Stall, Misfire VIN: 1GBEL19W1V
bad ecm tahnks for all the help but finaly got it to act up and die taped the enc and started right up tahnks again Brian
1999 Chevrolet Astro LT 4.3L timing componants
Thanx for all replies,customer picked up said vehicle and has elected not fix the vehicle but all info was very helpful to me and I do think that there is some cam issues as to why there is still a miss.
2001 Chevrolet Silverado 2500 HD 8.1L Noise from off idle to 1300 rpm VIN: 1GCHK23G61
I haven't fixed this one yet, have been too busy. I will come back and post the fix as soon as I get a chance to fix this thing. Replies suggested: cracked flywheel, torque converter hub, check starter. I'm going to pull the transmission next to take a look. ...
2007 Chevrolet Trailblazer LS 4.2L Sunroof
Found out there is adjustment on the sliders, thank for all your help
1991 Dodge Dynasty LS 3.3L Surge, Stall, Misfire VIN: 1B3XC56R6M
Most replies had to do with cylinder leakage and possible head gaskets. Cylinder leak down was checked with valve train intact and with push rods removed. there was no change. Camshaft lobe lift was mentioned, but that had already been checked and re-check...
2001 Dodge Grand Caravan Sport 3.8L Pcm VIN: 2B8GT44L41
After replacing the computer again I got 8 volts to my cam and crank and good grounds. It was sputtering through the intake then so i check the timing and the chain was wore out and it was several teeth off. Put a timing chain kit in it and it fired right up a...
2002 Dodge Ram 1500 ST 4.7L Poor Idle Quality, Surge, Stall VIN: 1D7HU16N22
Thank you all for the help and encouragement with this solved problem. You can pick your own cliche for this: "Hindsight is always 20/20”, “Sometimes can't see the forest through the trees”, “K.I.S.S.” are just some good ones. It's impossible to be perfectly o...
2005 Dodge Caravan SXT 3.3L Misfire VIN: 1D4GP45R95
Thank you all for your replies.I bit the bullet and had our mobile programer come down and program this mini van. I also replaced the new champion plugs with the ones the TSB recomended. They turned out to be NGK. Misfire went away ran all the monitors but the...
2006 Dodge Ram 2500 SLT 5.9L transfer case shift motor VIN: 3D7KS28C06
Thanks for the 2-replies. This ended up being a wiring problem in the 5v ckt as mentioned in other posts, it had to do with the ac transducer ckt. But this short was found in a different location. 2-main plug-ins above the oil dip stick tube have harness "f...
2007 Dodge Nitro SXT 3.7L Starting VIN: 1D8GT28K27
Thanks to all the problem was a rusted ground on the engine. Cleaned ground and vehicle was back and running.
2008 Dodge Grand Caravan SE 3.3L Hesitation, Stall, Misfire VIN: 2D8HN44H08
This one is fixed. The alternator field control wire was being pulled to ground somewhere in the harness. I was able to see this with a scope. Ran a new wire. Problem gone. Thanks everyone for the help. Trouble codes: P0339 (p1128-), P1128 (p0300-), P0300.
1998 Ford Ranger Splash 3.0L Oil Pan VIN: 1FTYR14U0W
1999 Ford Windstar SE 3.8L running lean VIN: 2FMZA5248X
Well I am going to have to close this without a fix because I havent been able to the vehicle back yet. Updated info , I checked vacuum with a gage with engine cold & its 17.5-18".Also sprayed around intake with carb. cleaner & no change. I'm going after the f... Trouble codes: P0453.
2009 Hyundai Sonata SE 2.4L MIL Lamp on VIN: 5NPEU46C49
I found no faults with the system, ended up replacing the secondary charcoal filter in the evap vent line. The new one didn't seem much harder to blow through than the original one but seems to have taken care of it. Not sure if it was the filter or f.w.f.a. T... Trouble codes: P0449.
1997 Mazda 626 DX 2.0L Ect wiring VIN: 1YVGE22C6V
Thanks to those that helped. I release the vehicle becouse I can not figure out the problem. I check for swap conectors, grounds, power, signal, continuity everything lucked ok. So I cut the two wires right from the pcm and still this was seing 66*f and when ...
2012 Mercedes-Benz E350 3.5L soft top VIN: WDDKK5KF4C
the instructions in the owners manual are to close the top. to be able to open the top with the roll bars deployed can not be done. first the bars need to go down, this is done by removing the back seat and locating the lever that locks the roll bar up , rota...
2007 Mitsubishi Endeavor LS 3.8L No Start VIN: 4A4MM21S77
2007 Nissan Maxima SL 3.5L Tcm VIN: 1N4BA41E87
What I finally found was that the Mass airflow sensor was the problem. I noticed that I had a hesitation when the engine was cold and before starting one morning I was going through all the data and I noticed that the coolant temp was 60 degrees and the intake...
1989 Pontiac Firebird Trans Am 3.8L Misfire VIN: 1G5FW2177K
well zarkis nailed it! the maf was crapping out installed reman and running perfect again man i love my tta!!@! thanks guys for the support! greg
2006 Porsche 911 Carrera 4S 3.8L Motor VIN: WP0AB29996
2004 Saab 9-3 Arc 2.0L Ignition switch VIN: YS3FD79Y74
First of all I really want to thank all who responded.The CIM was definitely the culprit.As this vehicle was jamming up an alignment hoist and no tech 2 to help us out a guy gets desperate.This is for knowledge pourposes just in case this ever happens to you.A...
2003 Subaru Impreza WRX 2.0L No Start, Misfire, MIL Lamp on VIN: JF1GD29683
Pressure tested the cooling system with the throttle body pulled forward and did not seen any coolant leaks so moved on to a cylinder leak test and found head gasket leakage from combustion to cooling system passages on both heads. Assuming engine may have bee...
2000 Suzuki Grand Vitara JLX 2.5L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: JS3TD62V3Y
Thank-you to all whom replied to my help request. After starting back from basics and deciding that I surely missed something, I scoped the maf sensor power, ground, and signal. Discovered that when the rpm was increased the signal would drop for a moment and ...
1994 Toyota Camry LE 2.2L Idle Vibration VIN: 4T1SK12W5R
Many folks advised to take a look at the balance shafts but the customer would not authorize us to disassemble and inspect which quite frankly was ok with us. She had owned the car for many years so we were confident the balance shafts hadn't been removed. We...
2007 Toyota Tundra SR5 5.7L battery VIN: 5TFRV54187
thanks for the help opened up the power distribution center and changed the main fuse ,works ok now
2008 Toyota Prius Touring 1.5L Dash warning VIN: JTDKB20U48
Hi thks for all the help cust decided to trade vehicle in and didnt want to spend any money for further diagnosis. Thks again Doug
2005 Volvo S80 2.5T 2.5L abs VIN: YV1TS59205
Well, the car's still not fixed, but I gotta close the post 'cause the time's up. I replaced the complete hydraulic unit, and the noise and ABS light came back a day later. I called the Xemodex tech line to see if they'd be any help, and, come to find out th...
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